Ademor n



No. 750,119. v

PATENTED 'JAN. 19, .1904. A. N. PETIT. I I OELLULOIVD PHONOGRAPH RECORD CYLINDER.

APPLICATION FILED MAR. 25, 1903- NO MODEL.

IO "of which cylinders the records are to be en- 1 5 engraving, and the cylinders have been adapt 2O loid surfaces upon which the record-engrav- Patented. January 19, 1904.

ADEMOR 'Ni ETIT, or WATERLoo, NEAR LIVERPOOL, "ENGLAND.

' .CE LLUL OID PHONOGR'APH RECORD-CYLINDER.

s'rncrrrcnrron forming at; of I letters Patent No. 750,119, dated. ianil r 19, 1904.

. 'Application fileCMarch 25,1903. Serial No. 149,475. (No model.)

' -T all whmn' it mayconcerm- Be itknown that I, 'ADEMOR NIPETIT, a citif z'enof the United "States'of America and a resident of Waterloo, near. Liverpool, Lancashire, England, have invented certain new and useful Improvementsin Celluloid Phonograph Record-Cylinders, ofwhi'ch the following is a specification.

Cylinders for phonograph and the like instruments, upon the exterior circular surface 'graved or cut, have generally been made of wax-like compositions or have been composed of a tubular base with'an outer coating of wax-like composition to receive the recorded to be slid onto a conical mandrel. carried .by the instrument. Recently 'many of these record-cylinders have been made wholly of celluloid or have beenprovided with cellu- "ing' has been produced, and when so constructed such cylinders have presented'many advantages in use, they are practically indestructible, and they retain "a perfect record of the sound-waves received from the transmitting instrument- This invention treats of record-cylinders which are formed wholly of celluloid; Now such cylinders in order to adapt them-to be slid and to fit ontothe' tapering mandrel have been madeas described in my prior United States Patent specification, No.666,937, J anuary 29, 1901, with one end bent inwardlyviz. that end which is to fit onto the large end of the mandreland the other end of the celluloid record-cylinder has been fitted with a ring of celluloid suitably cemented to the recordcylinder by means of an appropriate solvent of celluloid, and that ring has been made to fit the smaller end of the mandrel.

In the specification of my United States Patent No. 657 ,956, September 18, 1900, I have described as a new article of manufacture a celluloid record-cylinder in which both the ends are integrally bent, the length of the cylinder inwardly bent at one end being greater than the length of the cylinder inwardly bent at the other end, the two inwardly-extending ends being of dilferent diameters, so that they shall fit onto the taper- 'ing mandrel which is to carry the cylinder and 'grip that mandrel frictionally in such manner that the external surface'of the cylinder should be concentric throughout with the-axis of the mandrel, an air-space being left between the ,outer surface of the tapering mandrel and the inner surface of the record-cylinder. I have found that this latter construction of cylinder with the integrally bent ends is admirably adapted for the purpose of its use,

possessingasit does good wearing qualities and general durability, aswell'as lightness of weight. Thus my construction of cylinder with integrally inwardly bent ends, as described in my previous specification, No. 657,956, met the "stance (celluloid) of which it was coinposed, due to thechanges of temperature, caused the 1 cylinder to fit not always on; the same place 'upon the mandrel, and'therefore the object of my present invention is to construct the cylinder in suchmanner that thisdefect shall be non-existent. To this end and according to.

my present invention I formthe cylinder wholly of celluloid of sufficient thickness to be self-supporting and having its ends inturned as before explained, the internaldiameter of one-ofthe intu-rned -ends' being less thanthe internal diameter of the other inturned end, and the edges of these inturned ends I cause to enter the outwardly-extending flanges of annular chann el-section rings, which rings are made of metal having a much smaller coefficient of expansionthan the celluloid of which the cylinder is otherwise wholly composed. By this arrangement any expansion or contraction of the celluloid cylinder does not affect the fit of the rings which carry it upon the mandrel, the metal rings always fitting upon the same places on the said mandrel, while the outturned flanges of the rings hold the edges of the cylinder.

I am aware that it has been heretofore proposed when employing a flat disk of very thin celluloid for the purpose of receiving a record for a sound-reproducing instrument to proing or edging in order to increase its stiffness and stability; but such edging While serving a different purpose to the rings which I apply to the inturned edges of my cylinder consists of an annular channel-section ring, with the flanges inwardly turned to the axis, whereas the rings I apply must have the flanges of the channel-section outwardly turned to receive the inturned edges of the cylinder for the purpose of allowing the internal peripheries of the rings to fit around and onto a mandrel,

whereas the binding previously applied to a flat thin disk has not been employed for effecting such a purpose and was not for such a use.

In the drawings, Figure 1 is a longitudinal section of a cylinder according to my inven tion, Fig. 2 being an elevation of the righthand end of the same and Fig. 3 an elevation of the left-hand end.

As described in the specification of my previous patent, No. 657,956, the cylinder or record l is formed from a tube of celluloid of a suitable diameter, the saidtube being of sufiicient thickness for strength, while the interior diameter is somewhat greater at any point than the diameter of the mandrel which is to carry such a cylinder. The ends of this cylinder are turned inward, so that both inturned edges shall nearly fit the surface of the mandrel when the cylinder 1 is placed thereon, and therefore it follows that the length turned in at the end 2 must be greater than the length turned in at the end 3. The annular edges of the inturned ends 2 3 of the cylinder are provided with metal rings, (marked, respectively, 4 5,) the internal diameter of these rings being such that they will accurately fit upon the mandrel when the cylinder is located in the correct longitudinal position thereon. The rings 4 5 consist of comparatively thin metal, which has been bent or pressed into a U-shaped section, so that the arms in that U-section grip the inturned celluloid edges of the cylinder, the process of manufacture of such a cylinder, with its annular metal edges, forming the subject of a United States Patent application by myself, Serial No. 14:9,4573, filed simultaneously with this patent application. The phonographic record is then impressed upon the surface of this cylinder after the manufacture of the same has been completed-that is to say, after the ends 2 3 have been inwardly turned and after the metal rings 4 5 have been formed in their position shown. The formation of the record upon the surface of the cylinder is effected in a manner which is well knownnamely, by inserting the celluloid cylinder within a matrix which is itself an electrotype taken from a wax cylinder, and then the celluloid receives internal pressure and is expanded against the internal surfaces of the electrotype'matrix.

I claim as my invention As a new article'of manufacture, a celluloid cylinder for receiving phonographic records, consisting of a tube of celluloid of sufiicient thickness to be self-supporting, of larger internal diameter than the mandrel by which it is to be carried, and having integral inwardlybent ends, the length inwardly bent at one end being greater than the length inwardly bent at the other end, a metal ring of channelsection having the flanges of the channel facing outwardly from the axis of the ring to receive and carry the smaller diameter edge of one inturned end of the cylinder, and a similar ring of larger diameter having an outwardlyfacing channel to receive the edges of the inturned part of the other end of the cylinder, the internal'diameters of the two metal rings being such as to fit on the mandrel of the machine, and a phonographic record formed on the outer surface of the cylinder, substantially as set forth.

ADEMOR N. PETIT.

Witnesses:

REVILLE BEEBY, H. T. CRAD'IER-ARBUTS. 

